Problems I found so far : Carb needs rebuilt (Probably buy a new carb since they cheap) , intake manifold is dry rotted so I need to buy a new one and the reverse don't work which I don't care cause it does move forward. Me , my sister and my mom has been riding it around all day it just bogs down under a lot of throttle.

I have yet to find a carb rebuild kit for those Chinese equipment. But as you said the carbs are cheap enough it is just easier to replace the carburetor. I have a 70cc I got when a customer left it and didn't want to pay the repair charges. The grand-kids love riding it. I need to replace the left hand switch cluster because the plastic has basically disintegrated.